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CEL expression in CFX pre

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Old   May 31, 2016, 08:36
Default CEL expression in CFX pre
  #1
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meizhenwang
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Hi,
I am defining an expression of radial velocity under the cylindrical coordinate system in CFX pre. The expression is 0.3[m s^-1]*(y/(0.025[m]))^(1/7) .But when I run the CFX solver ,there is a error:
PROBLEM ENCOUNTERED WHEN EXECUTING CFX EXPRESSION LANGUAGE |
| |
| The CFX expression language was evaluating: |
| Velocity r Component |
| |
| The problem was: |
| INVALID-EXPONENTIATION |
| |
| FURTHER INFORMATION |
| |
| The problem was encountered in executing the expression for: |
| E1 |
| The complete expression is: |
| 0.3[m s^-1]*(y/(0.025[m]))^(1/7) |
| The error occurs on sub-expression: |
| (y/(0.025[m]))^(1/7) |
| |
| BACKGROUND INFORMATION |
| |
| The error was detected at one location. The same problem may be |
| present at other locations - that has not been investigated. |
| The following values are for the first location which has the |
| problem. |
| |
| In this expression, these sub-expressions have been calculated: |
| |
| Sub-expression = Value |
| |
| 0.3[m s^-1] = 0.300000 |
| These values were set before reaching the current expression: |
| |
| Name = Expression = Value |
| |
| y = $LOCAL_y = -1.387779E-17 |
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Old   June 3, 2016, 02:48
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david
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instead of using just "y", use "y+0.0001[m]".
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